Lamp.



` Patented Oct. 29, |90|.- N. JOHNSON.

LAMP.

(Application led Aug. 24, 1900.)

(No Model.)

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WITNESSES UNITE-D STATES PATENT OFFICE.

NIS JOHNSON, OF MERIDEN, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE INCANDESCENT PETROLEUM LIGHT COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF VEST VIRGINIA.

Y LAM P.

SPECIFICATION forming part of Letters Patent 1 \To. 685,449, dated October 29, 1901. Application met 'August za-1909. serial No. 27,882. (No model.)

To all whom t may concern: A Be it known that I, NIS JOHNSON, a citizen of the United States, residing at Meriden, in the county of New Haven and State of Connecticut, havein vented certain new and useful Improvements in Lamps; and I do hereby declare the following to be a full, clear, and ex` employed and in the novel construction ofthe 2o draft-collar and associated parts of the burner, whereby collection of unconsumed oil in the vicinity of the ame is prevented and the burner is simplified.

The lamp herein described is of the type cov- 2 5 ered by the patent to Paul Lucas, No. 597,682,

dated January 18, 1898, and is an improvement thereon.

The objects of my invention are to prevent careless raising of the Wick too high to pre- 3o vent the accumulation of unconsumed oil in the vicinity of the ame, whereby it may produce disagreeable odors, and to simplify the construction of the burner. These objects are attained in the lamp herein described and illustrated in the drawings which accompany and form a part of this specification, in which the same reference numerals indicate the same or corresponding parts, and in which- Figure 1 is a central vertical section of a 4o lamp and burner constructed in accordance with my invention; and Fig. 2 is a similar section of a portion of a lamp, showing another form of st'op.

In the drawings, the numeral l indicates the draft-tube or inner wick-tube of the lamp.

This tube may extend through the oil-reservoir 2 to the base, as in ordinary centraldraft lamps.

` 3 designates the outer wick-tube, and 4' the outer` perforated skirt or casing of the burner, 5o which surrounds the outer wick-tube and supports the chimney-gallery 5.

6 designates the draft-chimney, 7 the mantle, and 8 the mantle-rod, secured by a setscrew to the chimney-gallery 5.

9 is a hollow dome-shaped shell or thimble, open at the bottom and supported by a piu 10, yfitting within a socket 11, secured in the center ofthe draft-tube 1. The function and operation of this gasier are the same as of 6o the gasifier described and illustrated in the said Lucas patent, No. 597,682.

12 designates the wick. It is an ordinary tubular wick,tting between wick-tubes 1 and 3 and split at the bottom to permit the pas- 65 sage of a bracket` projecting from a toothed wick-band 13. From said bracket projects an arm 14, carrying at its end a screw-threaded nut 15, which surrounds and coacts with a wick-raising screw 16, having at its upper 7`o end a kurled head 17, by which it may be rotated. By rotating screw 16 in one direction or the other the wick may be raised or low; ered, as desired.

18 designatesa screw mounted in a threaded 75 sleeve 19, forming a part of the oil-reservoir 2, and located directly above the arm 14, so that said screw 18 may form ay stop to limit the upward movement of the Wick.

Lamps of the class to which this invention l 8o belongs are likely to smoke their mantles or otherwise give trouble if their Wicks are raised too high while the lamp is in operation. IneXperienced persons are likely to raise the wicks too high, not being aware how little wick exposure is required to causo the lamp to operate to the best advantage. Raising the wick'too high is also likely to cause overheating of the burner, which may result in a change of lthe iiame back to the luminous 9o condition, and it may also cause charring f the Wick, thereby making necessary the .trimming of the wick. These objections I overcome by providing the lamp with a wickstop, which prevents the wick being raised -too high and also serves to indicate when ,the wick is at the proper height to secure good operation of the lamp. `The screw 1S forms such a stop, for it limits the height to which the arm 14 may be raised withouta readjustment of the wick-stop. The screw may be adjusted to compensate for wasting away of the wick, however, by simply turning it, and in a similar manner it may be adjusted to permit the proper exposure of wick when a new wick is placed in the lamp. In lamps of this class it is very desirable that when the lamp is in operation the lower face of the gasifier shall be quite close to the top of the wick; but when the gasifier is so close it is difficult to light the lamp, because the gasifier is in the way of a match used to light the lamp and because it tends to chill the flame, so preventing it from spreading around the wick. To facilitate the lighting of the lamp, therefore, I provide means for elevating the gasifier. Said means consists of a U- shaped rod 20, one limb of which is within the draft-tube l and abuts against the lower end of the gasilier-pin 10, while the other limb is within a tube 2l, reaching from the lower side of the oil-reservoir to the upper side thereof, and is provided at lthe top with a suitable handle. By raising this handle the gasitier may be lifted slightly, so as to facilitate the lighting of the lamp, after which the handle may be depressed, thereby permitting the gasilier to descend to its former and normal position.

The wick-stop shown in Fig. l is particularly adapted for use with wick-raising devices forming a part of the oil-reservoir of the lamp. In Fig. 2 I have shown a wickstop adapted to be used with the common screw-lift wick-raiser of central draft lamps. -Such wick-raiser consists of a pinion-shaft 22, carrying 'a pinion 23, intel-meshing with a rack-bar 24, secured to the toothed wick-band 25. Upon the outer Wick-tube is a screw-threaded sleeve 2G, and upon said sleeve is an adjustable nut 27 of such diameter that the rack-bar 24: when raised contacts with it and is thereby prevented from being raised farther.

Referring again to Fig. l, 28 designates the contracting draft-collar ofthe lamp. Preferably it is formed integrally with the main portion of the skirt 4,and the chimney-gallery 5 is provided with an upwardly-projecting sleeve 29, fitting over the skirt 4 and supported thereby and forming, in effect, a continuation of said skirt and surrounding the gasifier and serving to steady the mantle and to protect the lower end thereof, as well as to shield the flame from drafts. Said sleeve 29 and draft-collar 28 together form apocket in which unconsumed oil might condense or collect otherwise, and so give rise to a disagreeable smell. To obviate the production of such smell, I provide perforations in the upwardly-projecting portion of the draft-collar 2S, through which perforations flame may pass. Collection of unconsumed oil in the said pocket is thereby prevented.

The operation of the lamp is as follows:

To light the lamp, the skirt 4, which is normally held in place by a simple bayonet-joint in the ordinary manner, is removed with the chimney and mantle. The gasifier is then raised by means of the rod 20, and if the wick be not at the proper height it is adjusted by .means of the wick-raiser. The top of the lwick should project very slightly above the tops of the wick-tubes. It' the wick-stop is not in proper adjustment, it is then adjusted to prevent the wick from being raised more ythan very slightly above the tops of the wickcient, the rod 20 is pushed downward, so as to lower the gasifier, and the flame immediately changes to the non-luminous condition, the mantle becoming incandescent. The lamp will then continue to operate without further attention.` The wick-stop needv :not be adjusted each time the lamp is lighted, but requires adjustment only after the lamp has been in use for a considerable length of time, provided, of course, that the wick does not become carbonized at any time because of exhaustion of the oil-supply, for in lamps of this class since the main flame is not close to the top of the wick the wick does not carbonize or waste away rapidly, as in ordinary central-draft lamps, unless it be raised too high, and this is prevented by the wick-stop.

Having thus completely described my invention, what I claim, and desire to secure by Letters Patent, is-- Y l. In a lamp, the combination, with a wickband adapted to engage a wick, a member directly attached to said wick-band, for raising and lowering the same, and means for operating such member, of a screwthreaded stop, directly engaging the said member by which the wick-band is raised and lowered, and adapted to limit the height to which the wick may be raised.

2. In a lamp, the combination, of a wickband, an arm connected therewith, a screw engaging said arm and adapted to raise and lower the same, and another screw, mounted over said arm, and adapted to engage the same and to limit the height to which it may be raised.

3. In an incandescent oil-lamp, the combination, with a wick-tube, a central draft tube, a gasifier, and a skirt surrounding the wick-tube and gasifier, of a contracting draftcollar for concentrating in the vicinity of the top of the wick-tube the air-currents rising between the wicktube and skirt, said draftcollar having an upwardly-projecting portion IIO which is perforated so 'as to permit the pasland having an upwardly-projecting sleeve sage of flame and heated gases to the outside forming substantially a continuation of the of the draft-collar, thereby preventing the acskirt, projecting above the draft-collar, and cumulation ofodor-producing substances outserving to protect the llame from vair-drafts.

5 side of said draft-collar. In testimony whereof I affix my signature 15 4. In an incandescent oil-lamp, the coxnbiin the presence of two Witnesses. nation, with a Wick-tube, a central draft- NIS JOHNSON. tube, a gasifier, and a skirt surrounding the Witnesses: wick-tube and provided with a contracting CORNELIUS J. DANAHERy ro draf t-collar, of a gallery seated upon the skirt THOMAS HINOKY. 

